Atrial fibrillation is a disorder that can lead to further health complications if not dealt with appropriately. The main symptom of afib is an erratic and irregular heartbeat. While medicines can help to slow the heart rate, the presence of afib can increase the likelihood of blood clots that can cause a stroke. The greatest risk is that of a blood clot from another area of the body traveling to the brain which will then increase the chances of having a stroke. This is the reason that patients that suffer from afib are often prescribed a course of treatment that includes a blood thinner to decrease the chance of having a stroke.